That's what I've been using but doesn't work 100% of the time. Not that it's the extensions fault, it does help. cnn.com has been the worst offender for me, I e

That's what I've been using but doesn't work 100% of the time. Not that it's the extensions fault, it does help. cnn.com has been the worst offender for me, I ended up just disabling javascript on their site just to stop the damn autoplay videos. The other trick I've been using is uBlock Origin (or your fav ad blocker) to block the video player completely.